Update on my nepenthes

My nepenthes bicalarata has opened  its first upper pitcher this week as below . It hasn't pitchered since last year when I decided to put in new shelving. It's seems to have sulked because I moved it.
It's now hitting the top of the poly house. I'm nervous about trimming it and taking a cutting,
 I would rather it would side shoot. If I cover the apical bud would that take away its dominance causing side shoots? I did try to do some  marcotting on a large nepenthes six weeks ago  with no success. I'm not experienced with propagating from cuttings.